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Home Brew Forums > Home Brewing Beer > Hops Growing > is this powdery mildew?
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Old 07-09-2013, 02:51 PM   #1
neomantra
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Default is this powdery mildew?

I have been looking at different threads and also found this: http://www.uvm.edu/extension/cropsoi...deryMildew.pdf.

It doesn't seem to look exactly the same though. Is this likely to be mildew? Or something else?

Underside of some leaves:


On the actual bines:

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Old 07-13-2013, 07:49 PM   #2
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No, that is not Powdery Mildew. Looks like maybe bird poop, or slime leftover from a slug walking across your plants.

Nothing to worry about.

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Old 07-14-2013, 12:39 PM   #3
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Definitely not bird poop as it mostly appears on the underside of leaves. I haven't seen any slugs but that doesn't mean they aren't around I guess. Good to know it's not mildew though, thanks.

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Old 08-05-2013, 08:08 PM   #4
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the white webbing is making me think mealybugs

http://smallnotebook.org/2008/06/30/...s-in-disguise/ (see #3 for a pic)
http://howto.yellow.co.nz/home-garde...ll-mealy-bugs/

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Old 08-09-2013, 11:39 AM   #5
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That seems like a good possibility. Fortunately the treatments (spraying with a hose, wiping it off, spraying with soapy water) overlaps pretty well with what I was doing to deal with what seemed to be an aphid issue as well. It's hard to tell 100% whether the aphids are gone since the leaves were already damaged by them, but I see no more traces of this white gunk shown in the picture anymore. Also, cones seem to be growing.

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